I just recently found out wut its for dont know if its the correct info or not but anyway i see ppl wearing it on their mehndi and baarat but those who wear it on their baarat i think the grooms mother puts it on both the bride and the grrom and the couple cant open it until they go home and they have to open it up for each other which i found kindaa weird but i guess its a covo starter especially for the arranged marriages.
i found this out a few months ago when i went to pakistan for my wedding shopping and my mom just happend to ask one of out punjabi neighbors and she did not hesitate discussing its importance in front of everyone i was embarrassed bc of the way she was explaining it 